DIN EN 20898 1 PDF

The European Standard EN has the status of a . ISO (upon which BS EN is based), altering clause 1. Standard [WITHDRAWN] DIN EN Mechanical properties of fasteners; bolts, screws and studs (ISO ); german version EN. Purchase your copy of BS EN , ISO as a PDF download or hard copy directly from the official BSI Shop. All BSI British.

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For testing of full-size bolts, screws and studs the loads given in Table 6 to Table 9 shall be applied. Part 2 defines the mechanical properties for coarse threaded nuts up to an M39 size and a height of at least half the nominal diameter. B, Mn or Fn 0,15d 0,40 0, 0, 0, quenched and tempered Carbon steel quenched and tempered 0,25 0,55 0, 0, 9.

Marking is required for hexagon and hexalobular head bolts and screws with nominal diameters d W 5 mm. It is the constant aim of BSI to improve the quality of our products and services.

BS EN , ISO – Mechanical properties of fasteners. Bolts, screws and studs

Figure 10 — Marking of studs The symbols in Table 16 are permissible as an alternative identification of property classes. All standards are subject to revision, and parties to agreements based on this part of ISO are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Set screws and similar threaded fasteners not under tensile stresses; — Part 6: Before and after the application of the proof load, the bolt or screw shall be placed in a bench-mounted measuring instrument fitted with spherical anvils.

For measurement of permanent extension, the bolt or screw shall be djn prepared 208998 each end, see 20889 2. Nuts with specified proof load values — Fine pitch thread [5]. Endorsement notice The text of ISO Nuts with specified proof load values — Coarse thread [3].

Surface hardness readings taken at HV 0,3 shall be compared with a similar core hardness reading at HV 0,3 in order to make a realistic comparison and determine the relative increase which is permissible up to 30 Vickers points.


Dn with specified proof load values — Coarse thread [3] 5. Table 14 — Marking symbols Property class 3. Users of British Standards are responsible for their correct application. The non-notched side of the 2088 piece shall be located near the surface of the bolt. Figure 3 — Wedge loading of full-size bolts Table 10 — Hole diameters for wedge loading tensile test Dimensions in millimetres Nominal thread Nominal thread dha r1 dha r1 diameter d diameter d 3 3,4 0,7 16 17,5 1,3 3,5 3,9 0,7 18 20 1,3 4 4,5 0,7 eh 22 1,3 5 5,5 0,7 22 24 1,6 6 6,6 0,7 24 26 1,6 7 7,6 0,8 27 30 1,6 8 9 0,8 30 33 1,6 10 11 0,8 33 36 1,6 12 13,5 0,8 36 39 1,6 14 15,5 1,3 39 42 1,6 a For square neck bolts, the hole shall be adapted to admit the square neck.

Hardness readings for the surface hardness shall be taken on the ends or hexagon flats, which shall be prepared by minimal grinding or polishing to ensure reproducible readings and maintain 11 original properties of the surface layer of the material.

This British Standard, having Amendments issued since publication been prepared under the direction of the Engineering Amd. A British Standard does not purport to include all the necessary provisions of a contract.


It also excludes set screwswhich are covered under part 5. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Where screws are threaded up to the head, the requirements may be considered met even if a crack should appear in the first thread, provided that the head does not snap off.

There may not be a direct relationship between hardness and theoretical tensile strength.

Mechanical properties, screws and studs EN ISO 898-1:2013

From Wikipedia, the free encyclopedia. Enter the email address you signed up enn and we’ll email you a reset link. Retrieved from ” https: The grips of the testing machine should be self-aligning to avoid side thrust on the test piece.


Marking is required for hexagon and hexalobular socket head cap screws with nominal diameters d W 5 mm. NOTE 2 The thickness of the test plate should be greater than 2 d. Marking is required for bolts and screws with nominal thread diameters d W 5 mm. Torsional test and minimum torques for bolts and screws 2898 nominal diameter from 1 mm to 10 mm.

Compliance with a British Standard does not of itself confer immunity from legal obligations. This European Standard shall be given the status of a national standard, either by publication of an identical e or by endorsement, at the latest by Februaryand conflicting national standards shall be withdrawn at the latest by February Limits of sizes for general purpose external and em screw threads — Medium quality.

The Vickers hardness measurements are made at the three points shown on Figure 6. Fasteners, steel products, bolts, screws, studs, specifications, materials specifications, mechanical properties, physical properties, tests, mechanical tests, identification methods, designation, marking. Only bolts of nominal thread diameters d W 16 mm can be tested. After mounting, grind and polish the surface in accordance with good metallographic practice.

A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. Table 16 — Alternative marking symbols for studs Property class 5. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. Set screws and similar threaded fasteners not under tensile stresses [4] 6.

Remember me on this computer. ISO is an international standard that defines mechanical and physical properties for metric fasteners.